Cigarette filter



FIG. 1 is a front elevation view of a cigarette filter showing my new design.

FIG. 2 is a rear elevation view of the cigarette filter.

FIG. 3 is a side elevation view of the cigarette filter.

FIG. 4 is a top plan view of the cigarette filter, the bottom plan view being a mirror image; and,

FIG. 5 is a perspective view of the cigarette filter.

The broken line environmental showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cigarette filter, as shown and described. 